The Keysight E5052A has been replaced with newer models

The E5052A Signal Source Analyzer 10 MHz - 7 GHz is a single-instrument solution that offers an indispensable set of measurement functions for evaluating RF & microwave signal sources such as crystal oscillators, VCOs, SAW oscillators, DROs, YIG oscillators, PLL synthesizers, RFICs, and LO circuits. Capabilities include measurements of phase noise, frequency/power/phase transient, frequency, power, and DC current as well as a spectrum monitor function. This all-in-one solution is designed to provide accurate and efficient measurements with easy-to-use features to significantly improve design and test productivity. With built-in low-noise reference sources and an innovative technique called cross-correlation, the Signal Source Analyzer provides unparalleled phase noise sensitivity. Often tedious phase noise measurements are now more than 10 times faster! It also offers extremely high sampling rate and frequency resolution in its transient measurements, which satisfy test needs of fast switching synthesizers for today's and future wireless communications and aerospace/defense applications.